Post-tropical storm Arthur’s pounding rain caused a massive sinkhole that swallowed three trailers and one car at a Fredericton campground on Saturday.

Nadine Cormier was at the Hartt Island RV Resort on Saturday afternoon and watched as the sinkhole appeared.

"I watched a car go down into the sinkhole. Disappeared completely — gone. It ended up quite aways away," Cormier said.

Cormier said they saw some people "screaming and yelling" at the beginning.

"When we saw that [sinkhole], we went and banged on all the campers," Cormier said.

"There were a few tense moments but nobody got hurt."

Cormier said all of the campers started doing whatever they could to help people stay out of danger.

Post-tropical storm Arthur brought heavy rain across New Brunswick over the weekend.

Noonan recorded 140 mm of rain on Saturday. The Canadian Hurricane Centre said 100 km/h gusts of wind were recorded in Fredericton.